No.
In any triangle on a plane surface, each exterior angle is equal to the sum of the other two interior angles.
Suppose A,B and C are the interior angles and a b and c the corresponding exterior angles.
Then a < 90 implies that B + C < 90
and b< 90 implies that A + C < 90
This gives B+C+A+C < 180 so that A+B+C < 180 which contradicts a property of triangles.
A triangle with 3 acute angles is an acute triangle. All the angles in an acute triangle are acute.
In an acute triangle, all three angles are acute.
There are many possible shapes with two acute angles.
there are three acute angles in an acute triangle, because there are three corners.
Yes, that's possible. For instance a triangle with the angles 70°, 70° and 40° is both acute and isosceles.
No, an acute triangle can have an acute exterior angle. An exterior angle is formed by extending one side of the triangle, and its measure is equal to the sum of the two opposite interior angles. Since all interior angles of an acute triangle are less than 90 degrees, the corresponding exterior angles can also be acute, depending on which side is extended.
Yes, a Triangle can have 3 obtuse EXTERIOR angles of measure 120° ONLY in the case of an equilateral Triangle. OTHERWISE, a Triangle always has 2 obtuse Exterior angles and 1 acute Exterior angle.
It is possible for an isosceles triangle to be an acute triangle because, in an acute triangle all the angles have to be less than 90o.
All acute triangles have 3 interior angles and 3 exterior angles. This is true for all triangles.
A triangle with 3 acute angles is an acute triangle. All the angles in an acute triangle are acute.
No. An interior angle plus its exterior partner add up to 180 degrees. In order for an exterior angle to be acute, its interior partner would have to be obtuse, which doesn't happen in an acute triangle.
Yes
yes it is
A triangle can have a minimum of zero acute angles, which occurs in the case of a right triangle (which has one right angle) or an obtuse triangle (which has one obtuse angle). Therefore, it is possible for a triangle to have no acute angles at all.
In any right triangle, the two angles at either end of the hypotenuse are both always acute angles. But I don't think that would be called an 'acute' triangle, because an acute triangle is one in which all three angles are acute ones.
Every triangle must have either 2 or else 3 acute angles. The least possible is 2.
yes.. isosceles